# Yorkfield

Yorkfield is the code name for some Intel processors sold as Core 2 Quad and Xeon. In Intel's Tick-Tock cycle, the 2007/2008 "Tick" was Penryn microarchitecture, the shrink of the Core microarchitecture to 45 nanometers as CPUID model 23, replacing Kentsfield, the previous model.
Like its predecessor, Yorkfield multi-chip modules come in two sizes. The smaller version is equipped with 6MB L2 cache, and is commonly called Yorkfield-6M. The larger version is equipped with 12 MB L2 cache.
The mobile version of Yorkfield is Penryn-QC and the dual-socket server version is Harpertown. The MP server Dunnington chip is a more distant relative based on a different chip but using the same 45 nm Core microarchitecture. The Wolfdale desktop processor is a dual-core version of Yorkfield.
The successors to Yorkfield are the Nehalem based Lynnfield and Bloomfield.

## Variants

| Processor | Brand Name | Model (list) | Cores | L2 Cache | Socket | TDP |
| Yorkfield | Xeon | X33x0 | 4 | 2×3–2×6 MB | LGA 775 | 65–95 W |
| Yorkfield-CL | Xeon | X33x3 | 4 | 2×3–2×6 MB | LGA 771 | 80 W |
| Yorkfield-6M | Core 2 Quad | Q8xxx | 4 | 2×2 MB | LGA 775 | 65–95 W |
| Yorkfield-6M | Core 2 Quad | Q9x0x | 4 | 2×3 MB | LGA 775 | 65–95 W |
| Yorkfield | Core 2 Quad | Q9x5x | 4 | 2×6 MB | LGA 775 | 65–95 W |
| Yorkfield XE | Core 2 Extreme | QX9xxx | 4 | 2×6 MB | LGA 775 | 130–136 W |
| Yorkfield XE | Core 2 Extreme | QX9xx5 | 4 | 2×6 MB | LGA 771 | 150 W |

### Yorkfield

Yorkfield (codename for the Core 2 Quad Q9x5x series and Xeon X33x0 series) features a dual-die quad core design with two unified 6 MB L2 caches; their product code is 80569. They also feature 1333 MT/s FSB and are compatible with the Bearlake chipset. These processors were released in late March 2008 beginning with the Q9300 and Q9450. Yorkfield CPUs were expected to be released in January 2008. The release of Yorkfield, however, was delayed to March 15, 2008. Initially this delay was attributed to an error found in the Yorkfield chip, but later reports claimed that the delay was necessary in order to ensure compatibility with the 4-layer printed circuit boards utilized by many mainstream motherboards. At the Intel Developer Forum 2007, a Yorkfield processor was compared with a Kentsfield processor.

### Yorkfield-6M

Yorkfield-6M (product code 80580) are similar to Yorkfield but are made from two Wolfdale-3M like cores, so they have a total of 6 MB of L2 cache, with 3 MB shared by two cores. They are used in Core 2 Quad Q8xxx with 4 MB cache enabled and Core 2 Quad Q9xxx and Xeon X3320/X3330 processors with all of the 6 MB enabled. Q8xxx processors initially had no support for Intel VT unlike Q9xxx, but later versions all have VT enabled.

### Yorkfield XE

On November 11, 2007, Intel released the first Yorkfield XE processor, Core 2 Extreme QX9650. It is the first Intel desktop processor to use 45 nm technology and high-k metal gates. Yorkfield features a dual-die quad core design with two unified level-two (L2) caches of 6 MB each. It also features a 1333 MT/s FSB and clock rate of 3 GHz. The processor incorporates SSE4.1 instructions and has total of 820 million transistors on 2x107 mm$^2$ dies. QX9650 and QX9770 both are labeled as product code 80569 like Yorkfield, while QX9775, being made for Dual LGA 771 mainboards, uses product code 80574 like the Xeon X5482 "Harpertown" that it is closely related to.

### Yorkfield CL

The OEM-only Xeon X33x3 processors with 80 W TDP and product code 80584 are made for LGA 771 like Harpertown but are only supported in single-socket configurations. Like the dual-core Wolfdale-CL processor, these would work in regular Socket 775 mainboards after modification but are typically used in blade servers that otherwise require DP server processors like Wolfdale-DP or Harpertown.
vteIntel CPU core roadmaps from P6 to Panther Lake :
Atom (ULV)
Node name
Pentium/Core
Microarch.
Step
Microarch.
Step
600 nm
P6
Pentium Pro (133 MHz)
500 nm
Pentium Pro (150 MHz)
350 nm
Pentium Pro (166–200 MHz)
Klamath
250 nm
Deschutes
Katmai
NetBurst
180 nm
Coppermine
Willamette
130 nm
Tualatin
Northwood
Pentium M
Banias
NetBurst(HT)
NetBurst(×2)
90 nm
Dothan
Prescott
Prescott‑2M
Smithfield
Tejas
Cedarmill (Tejas)
65 nm
Yonah
Nehalem (NetBurst)
Cedar Mill
Presler
Core
Merom
4 cores on mainstream desktop, DDR3 introduced
Bonnell
Bonnell
45 nm
Penryn
Nehalem
Nehalem
HT reintroduced, integrated MC, PCH L3-cache introduced, 256KB L2-cache/core
Saltwell
32 nm
Westmere
Introduced GPU on same package and AES-NI
Sandy Bridge
Sandy Bridge
On-die ring bus, no more non-UEFI motherboards
Silvermont
Silvermont
22 nm
Ivy Bridge
Haswell
Haswell
Fully integrated voltage regulator
Airmont
14 nm
Broadwell
Skylake
Skylake
DDR4 introduced on mainstream desktop
Goldmont
Goldmont
Kaby Lake
Coffee Lake
6 cores on mainstream desktop
Amber Lake
Mobile-only
Goldmont Plus
Goldmont Plus
Whiskey Lake
Mobile-only
Coffee Lake Refresh
8 cores on mainstream desktop
Comet Lake
10 cores on mainstream desktop
Sunny Cove
Cypress Cove (Rocket Lake)
Backported Sunny Cove microarchitecture for 14nm
Tremont
Tremont
10 nm
Skylake
Palm Cove (Cannon Lake)
Mobile-only
Sunny Cove
Sunny Cove (Ice Lake)
512 KB L2-cache/core
Willow Cove (Tiger Lake)
X$^e$ graphics engine
Gracemont
Gracemont
Intel 7 (10nm ESF)
Golden Cove
Golden Cove (Alder Lake)
Hybrid, DDR5, PCIe 5.0
Raptor Cove (Raptor Lake)
Crestmont
Crestmont
Intel 4
Redwood Cove
Meteor Lake
Mobile-only NPU, chiplet architecture
Skymont
Skymont
N3B (TSMC)
Lion Cove
Lunar Lake
Low power mobile only (9-30W)
? (TSMC)
Arrow Lake
Darkmont
Darkmont
18A
Cougar Cove
Panther Lake
Strike-through indicates cancelled processors
Bold names are microarchitectures
Italic names are future processors :